Simplify the expression and write the answer without negative exponents.x7 ? x-2
A. x5
B. -x5
C. - 
D. 
Answer: A
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Answer the question based on the following situation:An honest coin is tossed 1600 times. The random variable X denotes the total number of heads that come up in the 1600 tosses.What are the chances that X is between 780 and 820?
A. approximately 95% B. approximately 68% C. approximately 34% D. approximately 80% E. none of these
Determine whether the given expression is a monomial (Yes or No). For those that are monomials, state the coefficient and degree.
A. yes; coefficient 5; degree 4 B. no C. yes; coefficient 5; degree -4 D. yes; coefficient 4; degree 5
Write a fraction to represent the shaded portion of the figure.
A. 
B. 
C. 
D. 
Find the LCD for the rational expression.
, 
, 
A. x(x + 5) B. 8x2(x + 5) C. 8(x + 5) D. 8x(x + 5)